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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 450 of 1203
Copyright ©
TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P0299-84: Turbocharger Underboost condition - Signal Below Allowable Range
Overview:
ISO Code
P0299-84
Customer Symptom
Boost Control strategy will not be active
Fault Effects (On Vehicle)
Boost Control strategy will not be active
Lamp Status (If Any)
MIL ON after 3 drive cycles
Fault Detection Condition
This fault gets logged if the Waste gate might not be working fine
Normal Operating Condition
Healthy wiring harness connections between EMS ECU and turbocharger
bypass valve
Probable Trouble Area
Wiring Harness connections, Check Waste Gate valve
Healing Condition
Ignition ON and after 3 driving cycles of fault rectification
Fault permanent deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow.
3. 40 warm up cycles.
4. ECU Flashing.
5. ECU Power-Fail
Component Details:
Turbo Charger bypass valve is a solenoid valve, whose magnetic coil is energized to open the valve. Valve can be
opened in any position between its 0% Opening to 100% Opening by controlling the magnetic coil energization.
Preliminary Checks:
1) Loose/ Damaged Connections between bypass valve and EMS ECU.
2) Check for back out of pins at both bypass valve connector and ECU connector.
3) Check for damage of pins at both bypass valve connector and ECU connector.
4) Check the continuity bypass valve connector pins to the ECU pins.
5) Check whether the bypass valve is getting main relay power supply